Changes in the frequency of genetic variants, such as lactose tolerance in certain populations, can be observed within a human lifespan. Microevolutionary changes in bacteria and viruses, like antibiotic resistance, can also be observed relatively quickly. Additionally, human-induced environmental changes can drive rapid evolution in species, such as urban-dwelling animals adapting to city environments.
The appendix is the best example of a vestigial organ.
On average, the human heart beats about 2.5 billion times over the course of a typical lifespan. This can vary based on individual factors like heart rate and overall health.
Yes, evolution can be measured through changes in traits, genes, or populations over time. This can be done through comparative studies, genetic analysis, or observing how species adapt to their environment.
The course of evolution in natural selection is determined by various factors such as environmental pressures, genetic variation within a population, and random chance. Individuals with advantageous traits that are better suited to their environment are more likely to survive and reproduce, passing on those traits to future generations. Over time, this leads to changes in the population as a whole.
Yes and no. Evolution is an observed biological phenomenon, and therefore fact. Evolutionary theory is a model explaining the things we find in biology and paleontology in terms of what we know about evolution through genetics and population dynamics. The point really is not that evolution can be seen as either as theory or as fact, the point is that it is a factual theory; it is a theory which is so well supported by vast quantities of evidence that it would be unscientific and unreasonable to doubt the validity of that theory. Scientists also do not know everything about the evolutionary history of the Earth, or about exactly how evolution takes place, and research into evolutionary biology continues. Theories can be revised. But in the case of Darwin's Theory of Evolution, although many details have been revised, and additional details are likely to be revised, the essential thesis remains, that life does evolve, and that evolution is the process by which the species we observe today on Earth (including the human race) came into existence. Of that, there is no reasonable doubt. Of course, if anyone has a religious belief which compels them to believe otherwise, that is their privilege, but the pious rejection of science does not lead to a better understanding of reality.
No, of course not. Evidence does not prove evolution - it validates the theory.Evidence which Darwin had included limited fossils, and observed apparent speciation in birds.
Tortoise has the longest lifespan - barring accidents and disease, of course.
Contingent evolution is one of the forces of Darwin's theory of evolution. It is based on the concept of how power of accidents and happenstance shape the course of evolution.
Yes of course, smoking is bad!
Directly Observed Therapy , Short course {FOR TUBERCULOSIS}
The appendix is the best example of a vestigial organ.
ya of course keep trying
Selective Breeding of course!
Directly Observed Therapy; short course
stagewise transformation
the lifespan of 1 is 7 pitches.
Observed trials is a kind of discipline in Mountain Biking. It is where a rider attempts in passing through an obstacle course without getting his foot lay on the ground.